South Branch is an unincorporated community in the U.S. state of Michigan. The community is primarily located within Goodar Township, Ogemaw County, although a small portion extends east into Plainfield Township, Iosco County. As an unincorporated community, South Branch has no legally defined boundaries, population statistics, or administrative powers of its own; however, a post office operates out of the community, with ZIP Code 48761.

History

The community of South Branch was established in 1887, and was given a post office in 1889 with the name "Hunt". The post office was renamed South Branch in 1893. The community briefly had a station on the Detroit and Mackinac Railway.